housekeeping
    
      * updated CodeBlocksLinux project
      * updated changelog, version numbers, and READMEs
      * added Builds/Scripts/cppcheck-filtered.sh
      * addresssed some lint issues
      * added AvCaster::SetWindowTitle()
      * removed MainContent::instantiate(), MainContent::setTitle()
      * removed AvCasterApplication param from MainWindow constructor
      * removed MainWindow param from MainContent constructor